文献类型：期刊文献

英文题名：New insights into the role of dietary marine-derived polysaccharides on productive performance, egg quality, antioxidant capacity, and jejunal morphology in late-phase laying hens

作者：Guo, Yan[1];Zhao, Zhi-Hui[1];Pan, Zi-Yi[1];An, Li-Long[1];Balasubramanian, Balamuralikrishnan[2];Liu, Wen-Chao[1]

机构：[1]Guangdong Ocean Univ, Coll Coastal Agr Sci, Dept Anim Sci, Zhanjiang 524088, Guangdong, Peoples R China;[2]Sejong Univ, Coll Life Sci, Dept Food Sci & Biotechnol, Seoul 05006, South Korea

年份：2020

卷号：99

期号：4

起止页码：2100

外文期刊名：POULTRY SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000525955500035)、、Scopus(收录号：2-s2.0-85079886690)、WOS

基金：The present study was supported by the Natural Science Foundation of Guangdong Province (2018A030307023), Talent Research Start-up Project of Guangdong Ocean University (R18007, R17103), South China Sea Scholar by Guangdong Ocean University (573118025), Innovative Strong School Engineering Youth Talent Project (2017KQNCX090) and Key Platform Projects (2018302) by Department of Education in Guangdong Province, and National Research Foundation grant (2018R1C1B5086232) funded by Korean Government (MEST).

语种：英文

外文关键词：aged laying hen; egg production; egg quality; Enteromorpha; marine-derived polysaccharides

外文摘要：The present study was conducted to evaluate the effects of dietary marine-derived polysaccharides (MDP) from seaweed Enteromorpha on productive performance, egg quality, antioxidant capacity, and jejunal morphology in late-phase laying hens. A total of 240 Lohmann white laying hens (62 wk of age) were assigned to 4 dietary treatments that included MDP at concentrations of 0, 1,000, 2,500, and 5,000 mg/kg for 6 wk. Each treatment had 6 replicates with 5 cages (2 birds/cage). The results showed that dietary MDP quadratically improved egg production (P < 0.05) during 5 to 6 wk and 1 to 6 wk. There was a linear reduction in cracked egg rate (P < 0.05) with dietary MDP levels increased during 3 to 4 wk and 1 to 6 wk. After 4 wk of feeding trial, the egg shell thickness, yolk color, and Haugh unit showed a linear increase (P < 0.05) in response to increasing dietary MDP levels. Besides, the egg shell breaking strength, egg shell thickness, yolk color, and Haugh unit were improved linearly (P < 0.05) by dietary MDP at the end of the experiment. Moreover, dietary MDP showed a linear and quadratic reduction in serum malondialdehyde (MDA) content (P < 0.05) at the end of third week. At the end of experiment, the activity of total superoxide dismutase in serum was increased quadratically (P < 0.05) by dietary MDP, and dietary MDP quadratically improved the liver catalase (CAT) activity (P < 0.05) and linearly enhanced jejunal CAT activity (P < 0.05), whereas linearly decreased jejunal MDA concentration (P < 0.05). Furthermore, supplemental MDP linearly improved the villus height (P < 0.05) and quadratically increased villus height/crypt depth ratio (P < 0.05) of jejunum. However, dietary MDP had no effect on jejunal trypsin, amylase, and protease activity (P > 0.10). Taken together, these findings provided new insights into the role of MDP in improving the productive performance, egg quality, antioxidant capacity, and jejunal morphology of late-phase laying hens.